Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 22, NWS Melbourne, FL

July 2, 1990Flagler County, Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 2, 1990, 1:58 PM EDT for Flagler County, Volusia County, Florida. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Jul 2, 1990, 1:58 PM EDT (17:58 UTC)
Expired
Jul 2, 1990, 3:00 PM EDT
In force
62 min
Issued by
NWS Melbourne, FL
Area
Whole counties

Counties Flagler County, FL, Volusia County, FL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Jacksonville, FL (KAYS), launched 12:00Z, 6.0 hours before the alert went out and 145 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Jacksonville, FL at 12:00Z on 1990-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1171 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 12:00Z on 1990-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1171 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
1239 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
-19 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KDAB 021759
SVRDAB
FLC127-035-021900-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
158 PM EDT MON JUL 2 1990
 
THE NATIONAL WEATHER SERVICE IN DAYTONA BEACH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  300 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL FLORIDA
 
   ...NORTHWESTERN VOLUSIA COUNTY
 
AND THE ADJACENT COASTAL WATERS.
 
 
IN NORTHEAST FLORIDA
 
   ...SOUTHWESTERN FLAGLER COUNTY
 
AND THE ADJACENT COASTAL WATERS.
 
 
A SEVERE THUNDERSTORM WAS ALONG THE FLAGLER-VOLUSIA COUNTY LINE
ABOUT 20 MILES SOUTHWEST OF BUNNELL AND WAS MOVING SOUTH AT 15 MPH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER CO]VERS THE ROAD.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 2, 1:30 PM EDT, 28 minutes before
FLZ009-012-022000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
125 PM EDT MON JUL 2 1990

THIS STATEMENT CONCERNS MARION AND VOLUSIA COUNTIES OF NORTH FLORIDA.

THUNDERSTORMS WITH VERY HEAVY RAIN HAVE DEVELOPED ALONG THE EAST COAST
IN THE DAYTONA BEACH AREA AND ALSO OVER THE INTERIOR OF NORTH FLORIDA
BETWEEN OCALA AND GAINESVILLE.

THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING STRONG AND GUSTY WINDS...
DANGEROUS LIGHTNING...AND HAIL FOR THE NEXT ONE TWO HOURS AS THEY MOVE
SOUTH THROUGH THE AREA AT 15 MPH.

A WIND GUST TO 38 MPH WAS RECORDED AT THE NATIONAL WEATHER SERVICE OFFICE
AROUND 117 PM AND ALMOST ONE INCH OF RAIN FELL IN ABOUT 30 MINUTES.

SOME LOW LYING ARDEAS MAY BE FLOODING AND MOTORISTS CAN EXPECT FLOODED
ROADWAYS.
Special weather statement, Jul 2, 1:43 PM EDT, 15 minutes before
FLZ011-017-022100

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
140 PM EDT MON JUL 2 1990

...STRONG THUNDERSTORMS DEVELOPING...

AT 135 PM STRONG THUNDERSTORMS WITH VERY HEAVY RAIN WERE OVER DAYTONA BEACH
AND OVER THE COAST OF NORTHERN AND CENTRAL BREVARD COUNTY.  A STRONG
THUNDERSTORM WAS ALSO JUST NORTH OF DELAND.  THESE THUNDERSTORMS ARE CAPABLE
OF PRODUCING STRONG GUSTY WINDS...DANGEROUS LIGHTNING... AND SNOME HAIL FOR THE
NEXT COUPLE OF HOURS AS THEY MOVE SOUTH ACROSS ORANGE...SEMINOLE AND BREVARD
COUNTIES.

REMEMBER LIGHTNING IS A KILLER. WHEN LIGHTNING IS IN YOUR AREA GO TO A SAFE
PLACE.

The office that day

Everything else NWS Melbourne, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 2, 2:37 PM EDTSevere Thunderstorm WarningMLBBrevard68 min

Nearby

Severe Thunderstorm Warnings in Florida, 1990Every severe thunderstorm warning in 1990

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.